code: def forward_expected(self, inputs):
      x0, x1 = inputs
      return (utils.force_array(numpy.abs(x0 - x1), self.dtype),)
  
file_path: chainer/tests/chainer_tests/functions_tests/loss_tests/test_absolute_error.py
imports: import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer import functions
  from chainer import testing
  from chainer.testing import attr
  from chainer import utils
label_desc: Use image node_id 3 for calling the TestAbsoluteError obj's underlying member method code with example usage: obj.forward_expected(inputs) and returns: utils